Finding the Fourth Proportional to 22,799.37, 31,461.83 and 12,728.45

Step by Step Solution

1. Step 1: Write the proportion equation
   22,799.37 : 31,461.83 = 12,728.45 : x
2. Step 2: Convert to fraction form
   22,799.37/31,461.83 = 12,728.45/x
3. Step 3: Cross multiply
   22,799.37x = 31,461.83 × 12,728.45
4. Step 4: Simplify right side
   22,799.37x = 400,460,330.06
5. Step 5: Solve for x
   x = 400,460,330.06/22,799.37
6. Step 6: Final answer
   x = 17,564.53